LTC4279 Mosfet selection

Question

Hello, 
 
 We are designing a PSE for 60W 
 As requested in the LTC4279 datasheet, can you advise if the following MOSFETs can be used as external MOSFET? 
 - CSD19538Q2T 
 - SSM3K361TU 
 - any other suggestion in a package < 3x3mm 
 Thank you very much!

dreyeslt · Answer

The CSD19538Q2T and SSM3K361TU are not in 3x3mm packages. They have rather low SOA curves that would not quite meet PoE requirements. I do not recommend these. 
 For the 60W power level, consider the PSMN040-100MSE and the PSMN075-100MSE.

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LTC4279 Mosfet selection

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